package com.example.sign;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.graphics.Point;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.GridLayout;
import android.widget.Toast;

import androidx.constraintlayout.widget.Placeholder;

import java.util.ArrayList;
import java.util.List;

public class GameView extends GridLayout {

    public static final String TAG="RightFragment";
    public GameView(Context context) {
        super(context);

        initGameView();

    }


    public GameView(Context context, AttributeSet attrs) {
        super(context, attrs);

        initGameView();
    }

    public GameView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);

        initGameView();
    }

    protected void initGameView(){

        setColumnCount(4);
        setBackgroundColor(0xffbbada0);
        setOnTouchListener(new View.OnTouchListener(){

            private float startX,startY,offsetX,offsetY;
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                switch (event.getAction()){
                    case MotionEvent.ACTION_DOWN:
                        startX=event.getX();
                        startY=event.getY();
                        break;
                    case MotionEvent.ACTION_UP:
                        offsetX=event.getX()-startX;
                        offsetY=event.getY()-startY;

                        if(Math.abs(offsetX)>Math.abs(offsetY)){
                            if(offsetX<-5){
                                Log.d(TAG,"left");
                                swipeLeft();
                            }else if(offsetX>5){
                                Log.d(TAG,"right");
                                swipeRight();
                            }
                        }else{
                            if(offsetY<-5){
                                Log.d(TAG,"up");
                                swipeUp();
                            }else if(offsetY>5){
                                Log.d(TAG,"down");
                                swipeDown();
                            }

                        }

                        break;
                }

                return true;
            }
        });
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);

        int cardWidth=(Math.min(w,h)-10)/4;
        addCards(cardWidth,cardWidth);

        startGame();
    }

    private void addCards(int cardWidth,int cardHeight){
        Card c;
        for(int y=0;y<4;y++){
            for(int x=0;x<4;x++){
                c=new Card(getContext());
                c.setNum(0);
                addView(c,cardWidth,cardHeight);

                cardsMap[x][y]=c;
            }
        }
    }

    private void swipeLeft(){

        boolean merge=false;
        for(int y=0;y<4;y++){
            for(int x=0;x<4;x++) {
                for(int x1=x+1;x1<4;x1++){
                    if(cardsMap[x1][y].getNum()>0){
                        if(cardsMap[x][y].getNum()<=0){
                            cardsMap[x][y].setNum(cardsMap[x1][y].getNum());
                            cardsMap[x1][y].setNum(0);

                            x--;
                            merge=true;

                        }else if(cardsMap[x1][y].getNum()==cardsMap[x][y].getNum()){
                            cardsMap[x][y].setNum(cardsMap[x][y].getNum()*2);
                            cardsMap[x1][y].setNum(0);

                            MainActivity.getMainActivity().soundPool.play(MainActivity.getMainActivity().soundMap.get(1), 1, 1, 0, 0, 1);
                            MainActivity.getMainActivity().addScore(cardsMap[x][y].getNum());
                            merge=true;

                        }
                        break;
                    }
                }
            }
        }
        if(merge){
            addRandomNum();
            checkComplete();
            checkSuccess();
        }
    }
    private void swipeRight(){

        boolean merge=false;

        for(int y=0;y<4;y++){
            for(int x=3;x>=0;x--) {
                for(int x1=x-1;x1>=0;x1--){
                    if(cardsMap[x1][y].getNum()>0){
                        if(cardsMap[x][y].getNum()<=0){
                            cardsMap[x][y].setNum(cardsMap[x1][y].getNum());
                            cardsMap[x1][y].setNum(0);

                            x++;
                            merge=true;

                        }else if(cardsMap[x1][y].getNum()==cardsMap[x][y].getNum()){
                            cardsMap[x][y].setNum(cardsMap[x][y].getNum()*2);
                            cardsMap[x1][y].setNum(0);

                            MainActivity.getMainActivity().soundPool.play(MainActivity.getMainActivity().soundMap.get(1), 1, 1, 0, 0, 1);
                            MainActivity.getMainActivity().addScore(cardsMap[x][y].getNum());
                            merge=true;

                        }
                        break;
                    }
                }
            }
        }
        if(merge){
            addRandomNum();
            checkComplete();
            checkSuccess();
        }
    }
    private void swipeUp(){

        boolean merge=false;

        for(int x=0;x<4;x++){
            for(int y=0;y<4;y++) {
                for(int y1=y+1;y1<4;y1++){
                    if(cardsMap[x][y1].getNum()>0){
                        if(cardsMap[x][y].getNum()<=0){
                            cardsMap[x][y].setNum(cardsMap[x][y1].getNum());
                            cardsMap[x][y1].setNum(0);

                            y--;
                            merge=true;

                        }else if(cardsMap[x][y1].getNum()==cardsMap[x][y].getNum()){
                            cardsMap[x][y].setNum(cardsMap[x][y].getNum()*2);
                            cardsMap[x][y1].setNum(0);

                            MainActivity.getMainActivity().soundPool.play(MainActivity.getMainActivity().soundMap.get(1), 1, 1, 0, 0, 1);
                            MainActivity.getMainActivity().addScore(cardsMap[x][y].getNum());
                            merge=true;

                        }
                        break;
                    }
                }
            }
        }
        if(merge){
            addRandomNum();
            checkComplete();
            checkSuccess();
        }
    }
    private void swipeDown(){

        boolean merge=false;

        for(int x=0;x<4;x++){
            for(int y=3;y>=0;y--) {
                for(int y1=y-1;y1>=0;y1--){
                    if(cardsMap[x][y1].getNum()>0){
                        if(cardsMap[x][y].getNum()<=0){
                            cardsMap[x][y].setNum(cardsMap[x][y1].getNum());
                            cardsMap[x][y1].setNum(0);

                            y++;
                            merge=true;

                        }else if(cardsMap[x][y1].getNum()==cardsMap[x][y].getNum()){
                            cardsMap[x][y].setNum(cardsMap[x][y].getNum()*2);
                            cardsMap[x][y1].setNum(0);

                            MainActivity.getMainActivity().soundPool.play(MainActivity.getMainActivity().soundMap.get(1), 1, 1, 0, 0, 1);
                            MainActivity.getMainActivity().addScore(cardsMap[x][y].getNum());
                            merge=true;

                        }
                        break;

                    }
                }
            }
        }
        if(merge){
            addRandomNum();
            checkComplete();
            checkSuccess();
        }
    }

    private Card[][] cardsMap=new Card[4][4];
    private List<Point> emptyPoints=new ArrayList<Point>();
    private void addRandomNum(){

        emptyPoints.clear();
        for(int y=0;y<4;y++){
            for(int x=0;x<4;x++){
                if(cardsMap[x][y].getNum()<=0){
                    emptyPoints.add(new Point(x,y));
                }
            }}
        Point p=emptyPoints.remove((int)(Math.random()*emptyPoints.size()));
        cardsMap[p.x][p.y].setNum(Math.random()>0.1?2:4);
    }

    public void startGame(){

        MainActivity.getMainActivity().clearScore();

        for(int y=0;y<4;y++){
            for(int x=0;x<4;x++) {
                cardsMap[x][y].setNum(0);
            }
        }

        addRandomNum();
        addRandomNum();


    }
    private void checkComplete(){

        boolean complete=true;
        ALL:
        for(int y=0;y<4;y++){
            for(int x=0;x<4;x++) {
                if(cardsMap[x][y].getNum()==0
                        ||(x>0&&cardsMap[x][y].equals(cardsMap[x-1][y]))
                        ||(x<3&&cardsMap[x][y].equals(cardsMap[x+1][y]))
                        ||(y>0&&cardsMap[x][y].equals(cardsMap[x][y-1]))
                        ||(y<3&&cardsMap[x][y].equals(cardsMap[x][y+1]))
                ){
                    complete=false;
                    break ALL;

                }
            }
        }
        if(complete){

            new AlertDialog.Builder(getContext()).setIcon(R.drawable.icon3).setTitle("你好").setMessage("游戏结束,您得分为"+MainActivity.getMainActivity().getScore()).setPositiveButton("重来", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {

                    startGame();
                }
            }).show();

        }
    }
    private void checkSuccess(){

        boolean success=false;
        ALL:
        for(int y=0;y<4;y++){
            for(int x=0;x<4;x++) {
                if(cardsMap[x][y].getNum()==2048){
                    success=true;
                    break ALL;
                }
            }
        }
        if(success){

            new AlertDialog.Builder(getContext()).setIcon(R.drawable.icon3).setTitle("你好").setMessage("游戏胜利").setPositiveButton("重来", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    startGame();
                }
            }).show();

        }
    }
}
